ecently, the toxicity of cadmium became a concern, but nickel-cadmium (nicad) batteries are still used commonly in many devices. The overall cell reaction is Cd(s) + 2 NiO(0H)(s) + 2 H2O(1) → 2 Ni(OH)(s) + Cd(OH)2(s) A certain nicad battery weighs 13.3 g and has a capacity of 300. mA hr (that is, the cell can store charge equivalent to a current of 300. mA flowing for 20 minutes).
ecently, the toxicity of cadmium became a concern, but nickel-cadmium (nicad) batteries are still used commonly in many devices. The overall cell reaction is Cd(s) + 2 NiO(0H)(s) + 2 H2O(1) → 2 Ni(OH)(s) + Cd(OH)2(s) A certain nicad battery weighs 13.3 g and has a capacity of 300. mA hr (that is, the cell can store charge equivalent to a current of 300. mA flowing for 20 minutes).
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter17: Electrochemistry And Its Applications
Section: Chapter Questions
Problem 84QRT
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Recently, the toxicity of cadmium became a concern, but nickel-cadmium (nicad) batteries are still used commonly in many devices. The overall cell reaction is Cd(s) + 2 NiO(0H)(s) + 2 H2O(1) → 2 Ni(OH)(s) + Cd(OH)2(s)
A certain nicad battery weighs 13.3 g and has a capacity of 300. mA hr (that is, the cell can store charge equivalent to a current of 300. mA flowing for 20 minutes).
a. What is the capacity of this cell in coulombs? b. What mass of the reactants is needed to deliver 300. mA hr?
C. What percentage of the cell mass consists of reactants?
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